'use strict'

class content {

  constructor () {
    //param默认就是/:id，若要改变路由，则可以设置此属性，比如设置为/:name
    //this.param = '/:id'
  }

  //以下方法，若不需要，要去掉，避免无意义的路由。

  //获取资源具体内容
  //对应路由 GET /content
  async get (c) {
    let sqltext = `SELECT * FROM content WHERE id=$1`
    let r = await c.service.psql.query(sqltext, [c.param.id])

    if(r.rowCount === 0){
        return c.status(404).send('content not found')
    }

    c.send(r.rows[0])
  }

  //创建资源
  //对应路由 POST /content
  async post (c) {
    try{
      //提交的Body数据通过c.body获取
      let data = JSON.parse(c.body)

      let sqltext = `INSERT INTO` 
                  + ` content(id, add_time, detail, title, update_time)`
                  + ' VALUES ($1, $2, $3, $4, $5)'

      //生成唯一ID
      let id = c.helper.makeId()
      let tm = Date.now()

      let r = await c.service.psql.query(sqltext, [
          id, tm, data.detail, data.title, tm
      ])

      if(r.rowCount === 0){
          return c.status(500).send('failed')
      }

      c.send(id)

  }catch(err){
      c.status(404).send('it is not json data')
  }
  }

  //更新资源
  //对应路由 PUT /content/:id
  async put (c) {

  }

  //获取列表
  async list (c) {
    let ret = await c.service.psql.query(`select * from content`)
    c.send(ret.rows)//等效于c.res.body = ret.rows
  }

  //删除资源
  //对应路由 DELETE /content/:id
  async delete (c) {
    let sqltext = `DELETE FROM content WHERE id=$1`
    let r = await c.service.psql.query(sqltext, [c.param.id]);
  }

}

module.exports = content
